<!DOCTYPE html>
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <div>
      <form action="?p=enviarEmail" method="POST">
        <label for="">Destinatario: </label>
        <input type="text" name="destinatario"/>
        <label for="">Assunto: </label>
        <input type="text" name="assunto"/>
        
        <textarea name="campo_texto_email">        
        </textarea>
        <input type="submit" value="Enviar">
        
      </form>
    </div>
  </body>
</html>